Cell III Flashcards

1
Q

What is the supportive structure of an animal cell

A

– Composed of microtubules, intermediate filaments, and microfilaments

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2
Q

What is the supportive structure of a plant cell

A

– Composed of microtubules and microfilaments

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3
Q

What is polymerization?

A
  • Assembly of monomers to extend the length of the
    filament
  • Monomers added to the + end
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4
Q

What is depolymerization?

A
  • Disassemblyofthefilament
    -Monomers removed from the +end
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5
Q

Three major cytoskeletal filaments?

A
  • microtubule
  • intermediate filament
  • microfilament
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6
Q

two types of motor proteins move along microtubules

A
  • kinesin: away from centrosome
  • dynein: towards the centrosome
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7
Q

Eukaryotic flagella

A

– Consist of several microtubules
– Move the cell by undulating—they whip back + forth
– Are surrounded by the plasma membrane

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8
Q

cilia

A

– Closely related to eukaryotic flagella
– Short, hairlike projections
– Cells generally have just one or two flagella – Some cells have many cilia

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9
Q

what is actin filaments AKA microfilaments

A

– Formed by polymerization of individual actin molecules into long strands
– Two strands coil around each other
– Grouped together into long bundles or dense networks – Usually found just inside the Plasma membrane

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10
Q

what is cell crawling:

A
  • caused by actin filaments growing in one direction, moving the cell
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11
Q

types of movement caused by actin-myosin interaction

A
  1. cell crawling
  2. cell division in animals
  3. cytoplasmic streaming in plants
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12
Q

intermediate filaments

A

– Are defined by size rather than composition
– Many types exist, each consisting of a different protein – Provide structural support for the cell
– Are not involved in movement

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